Force pump



APR. 1?, 11923.

E. J. BLOOM FORGE PUMP Filed Feb. 1, 1922 s Sheets-Sheet 1 2. 25%? JBAw/W Apr. 17, 11923. 11,451,831

E. J. BLOOM FORCE PUMP Filed Feb. 1, 1922 3 Sheets-Sheet 2 .--I II Apr. )1 '7, 1923.

J. BLOOM FORCE PUMP Filed Feb. 1, 1922' s Sheets-Sheet 5 ndeniom EEEEEEI ZP E Kw? Patented Ar. l7, i923.

EDGAR ll. BLOOM, 0F TIJFJFIN, 010.

FORGE PUMP.

To all :whom it may concern:

Be it known that I, EDGAR J. BLOOM, a citizen of the United States, residing at Titlin, in the county of Seneca and State of Ohio, have invented certain new and useful Improvements in Force Pumps, of which the following is a specification.

This invention relates to pumps and especially to a force pump employed in connection with a'lubricating system. A new type of chassis lubrication adopted in connection with automobiles provides a central source of oil and flexibleconduits conduct this to the various shackle bolts, knuckle pins, etc., that have heretofore been provided with separate grease cups or oil cups. Suitable flexible and swivelingconnections are provided to make, possible the connection between the chassis frame and the running gear. A force pump is used to force the oil from a suitable reservoir to the lubricating points.

It is the object of the present invention to provide an effective force pump especially designed for such a system and which can be ,very cheaply manufactured. However, the pump, as will be apparent, can be used almost anywhere and hence is of wide application.

In the drawings,-

Fig. 1 is a vertical cross section through the pump and reservoir with the plunger rod button on the dash of the car.

Fig. 2 is a vertical cross section of a modified form of construction, with the plunger rod button on the dash of the car.

Fig. 3 is a fragmentary vertical cross section of a still further modified form of construction.

Fig. 4 is an elevation of the reservoir and the pump showing the pump arranged to have the plunger operated from the instrument board of the car. I

a designates the oil reservoir which is simpl a sphere rovided with a neck portion The eye lt 0 screws into the dash fixture d and may be locked in any given position byithe lock nut e. The eye of the bolt fits over the shoulder of the neck to hold the reservoir a in any given position.

By screwing down the nut f the neck of the reservoir is firmly held in spaced relation with respect to the dash. This eye boltar rangement is a' valuable one in connection with the pump g. This pump has a flange Application filed February 1, 1922. Serial No. 533,4?6.

variations of the pump which supports the.

reservoir at the bottom.

The pump T j has external threads at its top which takes the nipple member m which is soldered to the bottom of the reservoir a and the nipple may be considered a part of the T for purpose of reference in the claims.

The packing washer n fits into the bottom of the nipple socket and onto the end of the T. There is sweated into the bore of the T, a vertical tube 0 which is spaced from the walls of the bore for the larger part of its length. On top of this vertical tube'is located a metal disk or check valve p which has some clearance from the side walls of the bore of the T. The plunger rod is designated g. The plunger is made up of 'a bushing? and a pair of leather cup washers shaving oppositely-directed flanges and spaced by the washer t. The bushing r engaging the packing washer y prevents the cup washers striking the end of the cylinder. By screwing down the nut u on the end of the plunger rod against the washer o, the plunger is completed. It will be noticed that this is a very cheap and simple construction.

The pump cylinder k is simply a short piece of tubing. A cap nut :20 closes the inner end of the pump' cylinder and is provided with an orifice to allow the plunger rod to slide therethrough.

One of the important features of this design is that after the plunger has been placed in the cylinder the cup washers are never again disturbed except under unusual circumstances nor are they required to pas an intake opening in the side of the cylinder which is calculated to disturb the cup Washers. This type of cup washer, especially where there are two cup washers-with oppositely-directed flanges, is easily disturbed and injured. The flanges when stroked the wrong way by running against an obstruction are very diflicult to rearrange and easil torn or destroyed. With the type of cylindlir and valve arrangement now to be described, it will be seen that there is absolutely no opening and no occasion for ever disturbing the cup washers after they have been amembled into the cylinder. The T, together with the v ertical tube, is 'a relatively chea construction from a manufacturing stan point. i

When the plunger is drawn toward the operator it tends to create a vacuum in the pump which draws the oil from the reservoir through the goose-neck z and down into the well 1 and into the pump cylinder of the pump. This well of the pump is between the wall of the main bore of the T and the wall of the vertical tube 0. The check valve p remains seated .over the outlet orifice through the vertical tube because the pressure is on top of the check valve. When the plunger of the pump is reversed the check valve 32 is driven up against the Washer n because the outer edges of the I check valve protrudes beyond the tube 0. Consequently the first 'efi'ect ofthe reversed pressure on the fluid is toforce the check valve against the packing washer a closing the intake and opening the outlet,which permits the fluid to run down through the outlet passage 2 into the elbow 3 and from here by various pipe connections to the ,points of distribution.

The purpose of the goose-neck is to prevent any oil from leaking out of the reservoir when the pump is not in operation. When the pump is not being used the check valve p is held to its seat simply by gravity and in passing over rough roads is arred up and down so that this would leak under ordinary conditions. Obviously with a cept what is drawn by suction.

Fig. 2 illustrates another way of accomplishing the same purpose. By bringing the distributing pipe 4; up above the oil in the reservoir, this acts asa trap which prevents any oil that might leak through the check valve 32 reaching the parts to be lubricated unless the same is forced thereto by the pump. a

Still another way of preventing leakage is shown in Fig. 3, where the check valve p is held to its seat by the coiledspring 5.

It is not necessary that the fixture that I have called a T should be" precisely formed as a T. The stem of the T'may have an oblique disposition, as is shown in Fig. 4, and the pump cylinder may also have an oblique disposition, as shown in this figure. This permits the pump plunger rod 9 to be extended up through the instrument board 6 goose-neck no oil can leave the reservoir exof the car where itis possibly more con-.

venient for the operator. A suitable flange '7 and nut 8 serves to form a fixture on the instrument board which'acts as' a guide for the inner end of the plunger rod 9.

In some of the claims 1 shall refer to the member j and the. nipple m. which has here tofore been described as a T as a fixture, for obviously-it is not absolutely essential that this member be formed as a T. The essential thing is that it is provided with a storage well into which a charge may be taken and is provided with an outlet opening from the storage well'which is located. above the plunger 1n the plunger cylinder. This location of the outlet opening above the plunger gives the fluid an upward course which quickly lifts the valve against its seat over the inlet ort. Otherwise this valve movement would e slow. With the edges of the valve overhanging into the well thevalve is caught in the upward-flowing fluid and quickly forced against its seat over the intake 'port.

What I claim is:

1. A pump, having in combination, a cylinder, a plunger reciprocating in said cyllnder, a fixture on theend of the cylinder, said fixture provided with an inlet opening, a well and an outlet opening, means by which the well may be filled with a liquid by gravity and valve means and for controlling said two openings and for closing the intake port and opening the outlet port when the plunger moves forward in the cylinder.

2. A pump, having in combination, a pump cylinder, a plunger guided in saizl cylinder, a fixture on the end of the cylinder provided with an intake port and outlet port and also a well, means by which the well may be filled with a liquid by gravity, a valve for controlling said two ports serving to close the outlet port and. open the intake port and to close the inlet port and open the outlet port when the plunger moves forward in the cylinder.

3. A pump, having in cdmbination, a cylinder, a plunger guided in said cylinder, a fixture on the end of, the cylinder provided with an. intake port, an outlet port, and a well, and a disk-like valve normally resting over the outlet port and arranged in the fixture to permit-the fluid "to be drawn by the same, said valve closing the outlet port,

inder, a plunger guided in said cylinder. a

fixture on the end of the cylinder provided with an intake port and avertical" tube therein spaced from the bore of the fixture to form a well and having an opening in its top to form an outlet port,and a valve located between the outlet port and the intake port 'and normally closing the outlet port, said valve being arranged to allow the passage of fillld thereby into the well and plunger chamber on the suction stroke of the plunger Hit) valve arranged to close the intake port upon the pressure stroke of the plunger.

5. A pump, having in Combination, a cylinder, a plunger slidable in said cylinder, a fixture on the end of the plunger provided with a vertical tube therein forming a well between the tube and the walls of the bore of the fixture, the said tube having an opening in its top to form an outlet port, said fixture at the top having a port above the opening in the vertical tube to form an intake port, and a disk-like valve having its edges overhanging the sides of the vertical tube, the said valve operating to close the outlet port to allow passage of the fluid by the valve into the well and plunger chamber, the said valve operating on the pressure stroke of the plunger to close the intake port and allow passage of the fluid through the outlet port.

6. A pump, having in combination, a cylinder, a plunger slidable therein, a fixture on the end of the cylinder provided with a vertical tube therein forming a well andhaving an opening in its top to' form an outlet port, the said fixture provided with an opening above said first-mentioned opening to form an intake opening, a valve operating between the two openings and serving to close the outlet opening and allow passage of fluid into the well and plunger chamber and serving on the pressure stroke of the plunger to close the intake opening and allow the passage of the fluid through the outlet port, a reservoir abovethe fixture, a fluid reservoir supported above the intake port of the fixture, and means forpreventing leakage of fluid from the reservoir to.

the ultimate points of distribution when the pump is not in use.

7. A pump, having in combination, a cylinder, a plunger reciprocating in the cylinder, a fixture on the end of the plunger provided with an upstanding tube having an opening in its top to form an outlet opening, the said fixture provided with an opening above such first-mentioned opening forming an intake opening, a valve between the intake opening and the outlet opening serving to close the outlet opening and allow passage of fluid by the valve to the well and plunger chamber formed between the vertical tube and the bore of the fixture and serving on the pressure stroke of the plunger to close the intake opening and allow the-passage of the fluid out the outlet port, a reser voir above the fixture, and means for preventing leaka'ge of the fluid from the reservoir to the ultimate points of distribution, except when suction is afforded by the pump plunger.

8. A pump, having in combination. a cylinder, a plunger reciprocating in the cylinder, a T-like fixture secured to the end of the cylinder and provided with a vertical tube therein having an opening above the cylinder connection with the T which opening forms the outlet opening, said vertical tube also being spaced from the walls of the bore of the T fixture to form a well, said fixture being provided with an opening above the opening in the tube to form an intake opening, and a disk-like valve operating between the two openings but serving to close the outlet opening and allow passage of fluid by'the valve into the well and plunger chamher and serving on the pressure stroke of the plunger to close 'theintake opening and open the outlet opening, a reservoir located above the intake'opening, and means for prevent: ing leakage of fluid from the reservoir to the ultimate points of distribution except when the pump is in operation. f

9. A pump, having in combination, a cylinder, a plunger reciprocating in the cylinder, a T-like fixture secured to the end of the cylinder and provided with a vertical tube therein having an opening above the cylinder connection with the T which opening forms the outlet opening, the

said vertical tube also being spaced from the .walls of the bore of the T fixture to form a well, said fixture being provided with an opening above the opening in the tube to and a reservoir connected with the intake opening.

10. A pump, having in combination, a cylinder, a plunger reciprocating in the cylinder, a fixture secured to the-end of the cylinder and provided with a-vertical tube having an opening above the cylinder connection with the fixture, the said vertical tube also being spaced from the walls of the bore of the fixture to form a well, said fixture being provided with an inlet opening above the opening in the tube, and a valve operating between the two openings but serving to close the outlet opening and let a passage of fluid by the valveinto the well and plunger chamber and serving on the pressure stroke to close the intake opening and open the outlet opening, and a reservoir v with the fixture which opening forms the outlet opening, the said vertical tube also being spaced from the walls of the bore of the fixture to form a well and the fixture being provided with an opening above the opening in the tube to form an intake opening, anti a disk-like valve operating between the two openings and having its edges overhanging into the well, the said valve serving to close the outlet opening and allow a passage of fluid by the valve into the Well and the plunger chamber and serving on the pressure stroke of the plunger to close the intake opening and open the outlet opening, and a reservoir connected with the intake opening.

In testimony whereofI afiix my signature.

EDGAR J. BLOOM. 

